Which statement is true about current?

• A. Voltage is the rate of charge flow.
• B. Current is the rate of power delivery.
• C. Charge is the rate of current.
• D. Current is the rate of charge flow.

Answer: (D)

Current tells you how quickly electric charge moves past a point in a circuit. It’s the rate at which charge passes per second, so it’s measured in amperes (coulombs per second). For example, if 4 coulombs flow each second past a point, the current is 4 amperes. Voltage is the potential difference that pushes charges, not a rate. Charge is the total amount of electric charge, not how fast it moves. Power is the rate at which energy is transferred, given by P = VI, not the rate of charge flow. So the statement that current is the rate of charge flow is the correct interpretation.